301 lines
9.1 KiB
JavaScript
301 lines
9.1 KiB
JavaScript
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/***********************************************************************
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A JavaScript tokenizer / parser / beautifier / compressor.
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https://github.com/mishoo/UglifyJS
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-------------------------------- (C) ---------------------------------
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Author: Mihai Bazon
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<mihai.bazon@gmail.com>
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http://mihai.bazon.net/blog
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Distributed under the BSD license:
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Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above
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copyright notice, this list of conditions and the following
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disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following
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disclaimer in the documentation and/or other materials
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provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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SUCH DAMAGE.
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***********************************************************************/
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"use strict";
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function characters(str) {
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return str.split("");
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}
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function member(name, array) {
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return array.indexOf(name) >= 0;
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}
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function find_if(func, array) {
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for (var i = array.length; --i >= 0;) if (func(array[i])) return array[i];
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}
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function configure_error_stack(ex, cause) {
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var stack = ex.name + ": " + ex.message;
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Object.defineProperty(ex, "stack", {
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get: function() {
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if (cause) {
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cause.name = "" + ex.name;
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stack = "" + cause.stack;
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var msg = "" + cause.message;
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cause = null;
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var index = stack.indexOf(msg);
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if (index < 0) {
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index = 0;
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} else {
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index += msg.length;
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index = stack.indexOf("\n", index) + 1;
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}
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stack = stack.slice(0, index) + stack.slice(stack.indexOf("\n", index) + 1);
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}
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return stack;
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},
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});
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}
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function DefaultsError(msg, defs) {
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this.message = msg;
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this.defs = defs;
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try {
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throw new Error(msg);
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} catch (cause) {
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configure_error_stack(this, cause);
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}
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}
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DefaultsError.prototype = Object.create(Error.prototype);
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DefaultsError.prototype.constructor = DefaultsError;
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DefaultsError.prototype.name = "DefaultsError";
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function defaults(args, defs, croak) {
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if (croak) for (var i in args) {
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if (HOP(args, i) && !HOP(defs, i)) throw new DefaultsError("`" + i + "` is not a supported option", defs);
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}
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for (var i in args) {
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if (HOP(args, i)) defs[i] = args[i];
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}
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return defs;
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}
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function noop() {}
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function return_false() { return false; }
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function return_true() { return true; }
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function return_this() { return this; }
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function return_null() { return null; }
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var List = (function() {
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function List(a, f) {
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var ret = [];
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for (var i = 0; i < a.length; i++) {
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var val = f(a[i], i);
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if (val === skip) continue;
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if (val instanceof Splice) {
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ret.push.apply(ret, val.v);
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} else {
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ret.push(val);
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}
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}
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return ret;
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}
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List.is_op = function(val) {
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return val === skip || val instanceof Splice;
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};
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List.splice = function(val) {
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return new Splice(val);
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};
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var skip = List.skip = {};
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function Splice(val) {
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this.v = val;
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}
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return List;
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})();
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function push_uniq(array, el) {
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if (array.indexOf(el) < 0) return array.push(el);
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}
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function string_template(text, props) {
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return text.replace(/\{([^{}]+)\}/g, function(str, p) {
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var value = p == "this" ? props : props[p];
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if (value instanceof AST_Node) return value.print_to_string();
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if (value instanceof AST_Token) return value.file + ":" + value.line + "," + value.col;
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return value;
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});
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}
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function remove(array, el) {
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var index = array.indexOf(el);
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if (index >= 0) array.splice(index, 1);
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}
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function makePredicate(words) {
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if (!Array.isArray(words)) words = words.split(" ");
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var map = Object.create(null);
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words.forEach(function(word) {
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map[word] = true;
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});
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return map;
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}
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function all(array, predicate) {
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for (var i = array.length; --i >= 0;)
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if (!predicate(array[i], i))
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return false;
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return true;
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}
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function Dictionary() {
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this.values = Object.create(null);
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}
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Dictionary.prototype = {
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set: function(key, val) {
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if (key == "__proto__") {
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this.proto_value = val;
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} else {
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this.values[key] = val;
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}
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return this;
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},
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add: function(key, val) {
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var list = this.get(key);
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if (list) {
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list.push(val);
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} else {
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this.set(key, [ val ]);
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}
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return this;
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},
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get: function(key) {
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return key == "__proto__" ? this.proto_value : this.values[key];
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},
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del: function(key) {
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if (key == "__proto__") {
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delete this.proto_value;
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} else {
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delete this.values[key];
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}
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return this;
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},
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has: function(key) {
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return key == "__proto__" ? "proto_value" in this : key in this.values;
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},
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all: function(predicate) {
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for (var i in this.values)
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if (!predicate(this.values[i], i)) return false;
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if ("proto_value" in this && !predicate(this.proto_value, "__proto__")) return false;
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return true;
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},
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each: function(f) {
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for (var i in this.values)
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f(this.values[i], i);
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if ("proto_value" in this) f(this.proto_value, "__proto__");
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},
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size: function() {
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return Object.keys(this.values).length + ("proto_value" in this);
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},
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map: function(f) {
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var ret = [];
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for (var i in this.values)
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ret.push(f(this.values[i], i));
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if ("proto_value" in this) ret.push(f(this.proto_value, "__proto__"));
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return ret;
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},
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clone: function() {
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var ret = new Dictionary();
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this.each(function(value, i) {
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ret.set(i, value);
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});
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return ret;
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},
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toObject: function() {
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var obj = {};
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this.each(function(value, i) {
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obj["$" + i] = value;
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});
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return obj;
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},
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};
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Dictionary.fromObject = function(obj) {
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var dict = new Dictionary();
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for (var i in obj)
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if (HOP(obj, i)) dict.set(i.slice(1), obj[i]);
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return dict;
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};
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function HOP(obj, prop) {
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return Object.prototype.hasOwnProperty.call(obj, prop);
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}
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// return true if the node at the top of the stack (that means the
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// innermost node in the current output) is lexically the first in
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// a statement.
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function first_in_statement(stack, arrow, export_default) {
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var node = stack.parent(-1);
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for (var i = 0, p; p = stack.parent(i++); node = p) {
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if (is_arrow(p)) {
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return arrow && p.value === node;
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} else if (p instanceof AST_Binary) {
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if (p.left === node) continue;
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} else if (p.TYPE == "Call") {
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if (p.expression === node) continue;
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} else if (p instanceof AST_Conditional) {
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if (p.condition === node) continue;
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} else if (p instanceof AST_ExportDefault) {
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return export_default;
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} else if (p instanceof AST_PropAccess) {
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if (p.expression === node) continue;
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} else if (p instanceof AST_Sequence) {
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if (p.expressions[0] === node) continue;
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} else if (p instanceof AST_SimpleStatement) {
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return true;
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} else if (p instanceof AST_Template) {
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if (p.tag === node) continue;
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} else if (p instanceof AST_UnaryPostfix) {
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if (p.expression === node) continue;
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}
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return false;
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}
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}
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function DEF_BITPROPS(ctor, props) {
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if (props.length > 31) throw new Error("Too many properties: " + props.length + "\n" + props.join(", "));
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props.forEach(function(name, pos) {
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var mask = 1 << pos;
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Object.defineProperty(ctor.prototype, name, {
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get: function() {
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return !!(this._bits & mask);
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},
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set: function(val) {
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if (val)
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this._bits |= mask;
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else
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this._bits &= ~mask;
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},
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});
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});
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}
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